No.
NiMH batteries do not spontaneously ignite under normal circumstances. The advantage of nickel-metal hydride batteries is that they offer high safety. The electrolyte is a nonflammable potassium hydroxide solution, so even if problems such as a battery short circuit occur, it will generally not cause spontaneous combustion. In addition, nickel-metal hydride batteries have good resistance to low temperatures. In a low temperature environment of minus 40 degrees, the available capacity of the battery does not decrease significantly, while the ternary lithium battery has an available capacity of minus 20 degrees. . will be reduced to approximately 75%. The energy density and cell voltage of nickel-metal hydride batteries are lower than those of ternary lithium batteries, so the volume and weight of the battery are larger for the samecruising autonomy. In terms of charging, nickel metal hydride batteries have poor high-rate charging performance, and their fast charging speed is only about one third of that of ternary lithium batteries, which is difficult to compatible with high-voltage charging platforms launched by many automobile manufacturers.
How long can the battery of a gasoline-electric hybrid car be used?
Hello, I am happy to answer your question. There are five main types of new energy vehicle batteries. These are lithium-acid cobalt batteries, lithium iron phosphate batteries, nickel-metal hydride batteries, ternary lithium batteries, graphene batteries. The pros and cons of these five battery types will help you outline the answers.
1 Lithium cobalt oxide battery: Advantages: production technologymature action, high energy ratio, about twice that of lithium iron phosphate battery. Disadvantages: High temperature stability is slightly worse than that of lithium-nickel-cobalt-manganate batteries and lithium-iron-phosphate batteries.
2. Lithium iron phosphate battery: Advantages: Currently the best stability among automobile lithium batteries. Disadvantages: There is still a large gap in energy density compared to ternary lithium batteries and lithium cobalt oxide batteries. That is, when the temperature is below -5, the charging efficiency decreases. And when the temperature is too low, the battery capacity will be affected. Models using lithium iron phosphate batteries are not suitable for driving in the north, especially in extremely cold areas such as the Northeast, because the temperature there is too low in winter, which will affect the battery life.e lithium iron phosphate battery life.
3. Nickel-metal hydride battery: Advantages: The battery has a large energy reserve, is lighter, has a longer life, and does not pollute the environment. Disadvantages: The manufacturing cost is too high and the performance is worse than “lithium batteries”.
4. Ternary lithium battery: Advantages: Compared with lithium cobalt oxide battery, ternary lithium battery is safer. It is more suitable for the future development trend of new energy vehicle batteries, suitable for northern weather conditions, and more stable at low temperatures. Disadvantages: The voltage is too low and the energy density is between lithium iron phosphate batteries and lithium cobalt oxide batteries.
5. Graphene Battery: Advantages: This new energy battery can reduce charging time by several hoursless than a minute away. Since graphene is added to lithium batteries, it can help lithium batteries reduce heat during the capacity process, achieve the purpose of reducing energy loss, avoid waste of large amount of energy, reduce heat damage to the battery, and prolong battery life. Disadvantages: The cost is too high, about 2000 yuan/g, and it cannot be applied on a large scale at present. 2Which brand of new energy vehicle batteries are of good quality? BYD is a new energy vehicle battery brand. It is well known that: 1. Many consumers buy new energy When it comes to cars, the first thing to pay attention to is the battery of new energy vehicles. Consumers who are familiar with batteries know that different types of batteries have a different feeldifferent when used, so consumers will pay close attention to the battery type. Nickel-metal hydride power batteries have just entered a maturity phase. It is currently the only battery system that has actually been verified, commercialized and adapted for use in hybrid vehicles. 99% of the existing hybrid battery market share is nickel-metal hydride power batteries 2. Ternary lithium batteries are based on lithium; Nickel-cobalt-manganese ternary cathode material is a lithium battery with cathode material. Compared with lithium cobalt oxide batteries, they are safer, but the voltage is too low and the energy density is between lithium iron phosphate batteries and 18650 lithium cobalt oxide batteries. The future trend of development of electric vehicle batteriesNew energy is adapted to northern weather conditions and the batteries are more stable at low temperatures. 3. As a relatively mature technology, lead-acid batteries remain the only electric vehicle batteries that can be mass-produced due to their low cost and high discharge rate. During the Beijing Olympics, 20 electric vehicles using lead-acid batteries provided transportation services for the Olympics. However, the specific energy, specific power and energy density of lead-acid batteries are very low, so electric vehicles using this energy source cannot have good speed and cruising range.
Electric vehicles, how often should you replace the battery?
Hybrid vehicle batteries can basically be divided into three categories: lithium batteriesternary, lithium iron phosphate batteries and nickel metal hydride batteries. The first two are lithium-ion batteries. The lifespan of ternary lithium batteries is less than 1,000 times, and that of lithium iron phosphate is about 2,000 times. After 10 years of use on a hybrid vehicle, the mileage is approximately 200,000 kilometers. Even if only one unit is damaged, the replacement cost is not high and there is virtually no overall replacement during the life cycle. The nickel-metal hydride battery is the type of battery used by Toyota hybrid vehicles. Its lifespan is approximately 500 cycles. It can also reach 1,000 cycles with superficial charging and discharging. Toyota uses the energy management system to achieve superficial charging and discharging. In models such as the Prius, unrepaired batteries remained intact after hundreds of years.Thousands of kilometers of driving. Therefore, the battery life of hybrid vehicles is extremely long and the warranty period is long, so consumers do not need to worry about the battery life. It should be noted that the power battery of a hybrid car is different from the lead-acid battery used for starting, lighting and on-board power. The first belongs to three types: ternary lithium battery, lithium iron phosphate battery and nickel-metal hydride battery. battery. Among them, they can basically be divided into three types: ternary lithium batteries, lithium iron phosphate batteries and nickel metal hydride batteries. The first two are lithium-ion batteries. The lifespan of ternary lithium batteries is less than 1,000 times, and that of lithium iron phosphate is about 2,000 times. After 10 years of useon a hybrid vehicle, the mileage traveled is approximately 200,000 kilometers. However, battery usage time is affected by vehicle condition. Generally, it can be used for more than 3 years when the on-board generator charges normally and the electrical appliances are grounded and there is no leakage. At the same time, abnormal usage cycles, especially in extreme weather conditions, especially cold weather, will affect the battery life, because it will affect the power generation and chemical reaction of the battery. What should be noted is the amount of low temperature added and the amount of energy needed to chemical reactions can be triggered depending on whether the energy needed exceeds the cost of the battery and begins to flow. In short, the definition of hybrid power is that it has reasonable high and excellent fuel performance.your driving performance. Its engine requires fuel, but when accelerating from the start, its fuel consumption can naturally be reduced with the help of the electric motor. Simply put, hybrid cars cost less to fuel than cars of the same size.
What types of batteries do electric vehicles have?
Hybrid vehicle batteries can basically be divided into ternary lithium batteries, lithium iron phosphate batteries and nickel metal hydride batteries.
The first two types are lithium-ion batteries. The ternary lithium battery has a life of less than 1,000 times, and the lithium iron phosphate battery has a life of about 2,000 times. hybrid vehicles with normal use of about 200,000 kilometers in 10 years, and the pressure Not great. Even if only one unit is damaged, the replacement cost is not high,a few hundred yuan per part, and the overall replacement will hardly take place during the life cycle. It is possible to do it 1000 times under this premise.
NiMH batteries have long been used in Toyota hybrids, with a lifespan of around 500 cycles. Many batteries have not been used for hundreds of thousands of miles. Combined with the long battery warranty of hybrid vehicles, you can buy with confidence without worrying about battery life.
Pure electric vehicle battery 1: lead-acid battery
Lead-acid battery has a long life, generally 1.5-2 years. The lead-acid battery is an electrode mainly composed of lead. and its oxidation Batteries are made of materials and the electrolyte is a solution of sulfuric acid. In the discharged state of a lead-acid battery, the main component of the positive electrode is dioxyof lead and the main component of the negative electrode is lead; in the charged state, the main components of the positive and negative electrodes are both lead; sulfate.
Pure electric vehicle battery 2: nickel-hydrogen battery
Nickel-hydrogen batteries can store twice as much energy per unit weight as lead-acid batteries, and d Other properties are also better than lead acid batteries. The price is 4 to 5 times higher than that of lead-acid batteries, and efforts are being made to bring it down. Nickel hydride batteries are charged using a constant current charging method. Different currents can be used to charge the battery depending on the battery's ability to accept current. There is no need to limit the battery cell voltage during the charging process. time, fast charging can be achieved.
Third vehicle batterye pure electric: lithium iron phosphate battery
Lithium iron phosphate battery refers to a lithium-ion battery using lithium iron phosphate as the cathode material. The cathode materials of lithium ion batteries mainly include lithium cobalt oxide, lithium manganate, lithium nickel oxide, ternary materials, lithium iron phosphate, etc. Among them, lithium cobalt oxide is the cathode material currently used in most lithium-ion batteries. The theoretical lifespan of the lithium iron phosphate battery is 7-8 years.
At present, there are three pillars of electric vehicle batteries: ternary lithium batteries, lithium iron phosphate batteries and nickel metal hydride batteries. Among them, nickel-metal hydride batteries are the most stable, lithium iron phosphate is the safest, and ternary lithium has thegreater power.
1. Ternary lithium battery
Ternary lithium battery is good in cooperation and has the highest power for the same weight. However, if the items are packed tightly, the temperature will be a little high. Therefore, ternary lithium batteries have very strict heat dissipation requirements. To ensure safety, each battery must have a safety device. Even if heat dissipation is in place, once a collision or short circuit is discovered, the ternary lithium battery may catch fire and spontaneously ignite. Moreover, the very popular Tesla uses it, with more than 7,000 ternary lithium batteries. And there are cases of Tesla spontaneous combustion.
2. Lithium iron carbonate battery
It is deeply loved by most automobile manufacturers. Although the power of the same weight is not as goodthan that of ternary lithium batteries, it has good thermal stability, is not easy to get angry, and the cost of heat dissipation parts is much lower. In addition, it has the advantages of high energy density, small size, long battery life and good security.
3. Nickel-metal hydride batteries
Nickel-metal hydride batteries are generally used in hybrid vehicles and their performance is worse than lithium batteries. This type of battery has a very good memory and clearly remembers overcharges and overdischarges. Therefore, nickel-metal hydride batteries have high requirements for charging and discharging times, and the power must be maintained within a fixed range. Therefore, the electrician recommends that you try to charge it after each use, and fully charge it at the same time.mps. Don't charge it for a while, use it for a while, then recharge it. This is an important point for “prolonging life”.
There is also a type of battery that has high energy conversion efficiency, zero pollution and long life, but it is not cheap, a little expensive and ordinary people can't afford it. This is a hydrogen fuel cell. In addition, anyone who has studied chemistry knows that hydrogen is flammable if transported or stored in large quantities, the requirements are very high, the risk factor is high, and the safety risk is relatively large.
Nowadays, these types of batteries have their own performance shortcomings and advantages. Therefore, car owners who want to buy a car should purchase an electric car with the corresponding battery according to their own needs, soe that no matter it is used, charged or maintained, there will be no major problems and it will not affect your life.